7.7. The annual Polar Challenge takes place in one of the world’s most ______ environments, where temperatures can drop as low as minus 50 degrees Celsius.
(A) amiable (B) hostile (C) favorable (D) pleasing

16.16. School recruitment can be made more flexible so that anyone who wants to learn can gain admission and graduate according to his or her ______.
(A) needs (B) predicaments (C) plights (D) complications